|   | Computational Chemistry Comparison and Benchmark DataBase Release 22 (May 2022) Standard Reference Database 101 National Institute of Standards and Technology | 
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| Species | Name | Experimental Angle | Calculated Angle | Difference | 
|---|---|---|---|---|
| H2CO | Formaldehyde | 116.1 | 115.5 | 0.7 | 
| CH3OH | Methyl alcohol | 109.0 | 108.2 | 0.9 | 
| CH4 | Methane | 109.5 | 109.5 | -0.0 | 
| CH3Br | methyl bromide | 111.2 | 110.6 | 0.5 | 
| C2H6 | Ethane | 108.0 | 107.8 | 0.2 | 
| C2H4 | Ethylene | 117.6 | 117.0 | 0.6 | 
| CH3Cl | Methyl chloride | 110.8 | 110.1 | 0.7 | 
| CH3NH2 | methyl amine | 108.4 | 108.0 | 0.4 | 
| CH3SH | Methanethiol | 110.3 | 108.4 | 1.9 | 
| CH2Br2 | dibromomethane | 110.9 | 111.6 | -0.7 | 
| CH2BrCl | Methane, bromochloro- | 109.5 | 111.4 | -1.9 | 
| C3H8 | Propane | 106.1 | 106.6 | -0.5 | 
| C3H8 | Propane | 107.3 | 108.0 | -0.7 | 
| C3H8 | Propane | 108.1 | 107.8 | 0.3 | 
| CH3CCH | propyne | 108.3 | 108.4 | -0.1 | 
| CH3CN | Acetonitrile | 109.5 | 109.1 | 0.4 | 
| CH3CHO | Acetaldehyde | 108.3 | 110.3 | -2.0 | 
| CH3CH2SH | ethanethiol | 106.6 | 107.5 | -0.9 | 
| CH3CH2SH | ethanethiol | 108.9 | 110.9 | -2.0 | 
| CH3CH2SH | ethanethiol | 108.9 | 107.5 | 1.4 | 
| CH3CH2SH | ethanethiol | 106.6 | 107.5 | -0.9 | 
| CH3CH2SH | ethanethiol | 108.1 | 108.2 | -0.1 | 
| CH3CH2SH | ethanethiol | 109.3 | 108.2 | 1.2 | 
| CH3CH2SH | ethanethiol | 106.9 | 107.9 | -1.0 | 
| CH2Cl2 | Methylene chloride | 112.1 | 111.2 | 0.9 | 
| CH2I2 | Diiodomethane | 111.6 | 111.4 | 0.2 | 
| CH3SCH3 | Dimethyl sulfide | 109.6 | 108.6 | 1.0 | 
| C3H6 | Cyclopropane | 114.5 | 114.8 | -0.3 | 
| C2H4O | Ethylene oxide | 116.8 | 115.8 | 0.9 | 
| Si(CH3)4 | tetramethylsilane | 109.8 | 107.7 | 2.1 | 
| CH2CHCH2CH3 | 1-Butene | 105.7 | 107.1 | -1.4 | 
| CH2CHCHO | Acrolein | 118.0 | 117.1 | 0.9 | 
| CH2CHCHO | Acrolein | 120.0 | 117.1 | 2.9 | 
| C5H8O | Cyclopentanone | 110.0 | 107.9 | 2.1 | 
| CH3CH2CHO | Propanal | 108.7 | 108.8 | -0.1 | 
| CH3CH2CHO | Propanal | 107.0 | 107.5 | -0.5 | 
| CH3CH2CHO | Propanal | 105.0 | 105.7 | -0.7 | 
| C4H8O2 | Ethyl acetate | 108.1 | 107.9 | 0.2 | 
| CH2N2 | diazirine | 117.0 | 119.9 | -2.9 | 
| C5H8 | Bicyclo[1.1.1]pentane | 111.7 | 112.0 | -0.3 | 
| CH2NN | diazomethane | 126.0 | 125.5 | 0.5 | 
| C2H5F | fluoroethane | 108.8 | 109.1 | -0.3 | 
| C2H5F | fluoroethane | 108.9 | 108.7 | 0.2 | 
| C2H5F | fluoroethane | 108.7 | 108.7 | -0.0 | 
| CH2BrF | Methane, bromofluoro- | 112.0 | 112.5 | -0.5 | 
| CH2FI | fluoroiodomethane | 113.0 | 112.5 | 0.5 | 
| C2H4S | Thiirane | 115.8 | 115.4 | 0.4 | 
| CH2FCH2CH3 | 1-Fluoropropane | 109.0 | 109.1 | -0.1 | 
| CH2FCH2CH3 | 1-Fluoropropane | 107.3 | 107.4 | -0.1 | 
| CH2FCH2CH3 | 1-Fluoropropane | 107.7 | 107.9 | -0.2 | 
| CH2FCH2CH3 | 1-Fluoropropane | 108.5 | 108.0 | 0.5 | 
| CH2CO | Ketene | 122.6 | 121.5 | 1.1 | 
| CH3OC2H5 | Ethane, methoxy- | 108.6 | 108.5 | 0.1 | 
| CH3OC2H5 | Ethane, methoxy- | 107.4 | 107.5 | -0.1 | 
| CH3OC2H5 | Ethane, methoxy- | 108.6 | 108.6 | 0.0 | 
| CH3F | Methyl fluoride | 110.2 | 109.8 | 0.4 | 
| CH2FCl | fluorochloromethane | 110.4 | 112.2 | -1.8 | 
| CH3OCl | methyl hypochlorite | 110.5 | 110.0 | 0.5 | 
| CH3OCl | methyl hypochlorite | 108.3 | 109.7 | -1.4 | 
| CH3SeCH3 | dimethylselenide | 110.3 | 110.3 | 0.0 | 
| C2H4F2 | 1,2-difluoroethane | 110.0 | 110.1 | -0.1 | 
| C2H4F2 | 1,2-difluoroethane | 109.1 | 110.0 | -0.9 | 
| CH2CHCH2F | Allyl Fluoride | 120.0 | 118.0 | 2.0 | 
| CH2CHCH2F | Allyl Fluoride | 119.3 | 120.9 | -1.6 | 
| H2CS | Thioformaldehyde | 116.5 | 115.9 | 0.6 | 
| CH3NO | nitrosomethane | 109.3 | 108.4 | 0.9 | 
| CH2ClCCCl | 1,3-dichloropropyne | 99.0 | 109.5 | -10.5 | 
| GeH3CH3 | methyl germane | 108.4 | 108.6 | -0.2 | 
| CH2NH | Methanimine | 116.9 | 116.4 | 0.5 | 
| CH3CH2O | Ethoxy radical | 108.1 | 110.9 | -2.8 | 
| CH3CH2O | Ethoxy radical | 106.5 | 105.1 | 1.4 | 
| CH3 | Methyl radical | 120.0 | 120.0 | -0.0 | 
| CH2 | Methylene | 135.5 | 132.4 | 3.1 | 
| CH2 | Methylene | 102.4 | 132.4 | -30.0 | 
| C3H4 | cyclopropene | 114.6 | 114.2 | 0.4 | 
| CH2Cl | chloromethyl radical | 122.6 | 123.7 | -1.1 | 
| CH2CS | Thioketene | 120.3 | 119.4 | 0.9 | 
| C5H6 | Propellane | 116.0 | 115.4 | 0.6 | 
| CH2PH | Phosphaethene | 117.2 | 115.8 | 1.4 | 
MP4/6-311G** for aHCH
|  | 80 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
|  | 70 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
|  | 60 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
|  | 50 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
|  | 40 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
|  | 30 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
|  | 20 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
|  | 10 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
|  | 0 |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 
| -35 | -30 | -25 | -20 | -15 | -10 | -5 | 0 | 5 | 10 | 15 | 20 | 25 | ||||||||||||||||||||||||||||
| Angle difference calc. - exp. (degrees) | ||||||||||||||||||||||||||||||||||||||||
| Species | Name | Difference (degrees) | |
|---|---|---|---|
| Most negative difference | CH2 | Methylene | -30.0 | 
| Most positive difference | CH2 | Methylene | 3.1 |